Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2792b392a665cf…

MALICIOUS

PDF

42.1 KB Created: 2021-06-03 08:54:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: be576fc6f3cd1a0396706a0424fbf63b SHA-1: 79b9324c4d95f33ec0368c208d201f5f0b6cfd10 SHA-256: 4b2792b392a665cf59bd2a24f9b95fdd0ef0799988f5f2a566174765b809b66d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with a malicious link. The embedded URL, https://netcdn.online/app/835599320/tiktok-free-generator-game-hack, likely leads to a second-stage payload download. The document's content and structure are consistent with social engineering tactics to achieve initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/835599320/tiktok-free-generator-game-hack PDF link annotation
    • https://wald-match.com.tw/upload/files/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/tiktok-free-app-download_GM835599320.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004b00.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B00 24504 bytes
SHA-256: ff2181d3ac4ca73478cfdb0809a2a73f1613d81b902c3c20d8ed711002b29d93
font_01_sfnt_off00008398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8398 17684 bytes
SHA-256: 36f79e5ed576324428425eb924940e9ecd2074bc3c79a728d99f5f0c2e8f7df4

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